共查询到17条相似文献,搜索用时 218 毫秒
1.
2.
3.
根据化学反应动力学和热动力学基本理论, 建立了简单级数反应的热动力学对比参量方程, 提出了一种新的热动力学研究法--对比参量法. 利用该法可以从一张热谱图上同时解析出化学反应的速率常数、半衰期和热动力学体系的冷却常数. 实验结果验证了方法的正确性. 相似文献
4.
5.
6.
时间参量法(Ⅳ)──对峙反应的热动力学研究 总被引:6,自引:2,他引:4
根据热动力学基本理论和对峙反应的通用微分动力学方程,将时间作为已知参量,建立了对峙反应热动力学时间参量法的数学模型,并利用该法分别研究了硝基乙烷与氨和三(羟甲基)氨基甲烷反应的热动力学. 相似文献
7.
8.
根据化学反应热动力学的基本原理.推导了连续一级反应的积分和微分热动力学方程,建立了连续一级反应热动力学时间参量法的数学模型,通过对己二酸二乙酯和邻苯二甲酸二乙酯皂化反应的热动力学研究,验证了连续一级反应时间参量法的正确性. 相似文献
9.
10.
根据化学反应热动力学的基本原理,推导了连续一反应的积分和微分和微分热动力学方程,建立了连续一级反应热动力学时间参量法的数学模型,通过对已二酸二乙酯和邻苯二甲酸二乙酯皂化反应的热动力学研究,验证了连续一级反应时间参量法的确定性。 相似文献
11.
12.
Chen Y. Xie J. Q. Zhang B. Zeng X. C. 《Journal of Thermal Analysis and Calorimetry》2004,75(3):847-855
A novel thermokinetic research method for determination of rate constants of simple-order reaction in batch conduction calorimeter
under isothermal condition, the characteristic parameter method, is proposed in this paper. Only needing the characteristic
time parameter tm obtained from the measured thermoanalytical curve, the kinetic parameters of reactions studied can be calculated
conveniently with this method. The saponifications of ethyl propionate and ethyl acetate in aqueous ethanol solvent, the polymerization
of acrylamide in aqueous solution, the ring opening reaction of epichlorohydrin with hydrobromic acid have been studied. The
experimental results indicate that the characteristic parameter method for simple-order reaction is correct.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
13.
Characteristic parameter method for studying kinetics of opposing reactions in calorimeter 总被引:1,自引:0,他引:1
According to the theoretical basis of thermokinetics, the integral and differential thermokinetic equations of opposing reactions have been derived, and a novel thermokinetic research method, the characteristic parameter method for opposing reactions which taking place in a batch conduction calorimeter under isothermal condition, has been proposed in this paper. Only needing the characteristic thermoanalytical data corresponding to tm and 2tm from the same curve, the rate constants of forward and backward reactions and equilibrium constant can be calculated simultaneously with this method. In order to test the validity of this method, the proton-transfer reactions of nitroethane with ammonia at 15 and 25°C, and with trihydroxymethyl aminomethane (Tris) at 15 and 30°C have been studied, respectively. The results of rate constants and equilibrium constants calculated with this method are in agreement with those in the literature. Therefore, the characteristic parameter method for opposing reaction is believed to be correct.This revised version was published online in November 2005 with corrections to the Cover Date. 相似文献
14.
15.
16.